package com.xuecheng.base.exception;

import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;

import java.util.ArrayList;
import java.util.List;


/**
 * 全局异常处理器
 */
@Slf4j
@RestControllerAdvice
public class GlobalExceptionHandler {

    /**
     * 项目自定义异常处理
     *
     * @param e
     * @return
     */
    @ExceptionHandler(XueChengPlusException.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public RestErrorResponse customException(XueChengPlusException e) {
        // 记录异常信息
        log.error("【系统异常】{}", e.getErrMessage(), e);

        // 解析异常信息
        String errMessage = e.getErrMessage();
        return new RestErrorResponse(errMessage);
    }


    @ExceptionHandler(Exception.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public RestErrorResponse exception(Exception e) {
        // 记录异常信息
        log.error("【系统异常】{}", e.getMessage(), e);
        if (e.getMessage().equals("不允许访问")) {
            return new RestErrorResponse("您没有权限操作功能");
        }

        return new RestErrorResponse(CommonError.UNKOWN_ERROR.getErrMessage());
    }

    // MethodArgumentNotValidException
    @ExceptionHandler(MethodArgumentNotValidException.class)
    @ResponseStatus(HttpStatus.INTERNAL_SERVER_ERROR)
    public RestErrorResponse methodArgumentNotValidException(MethodArgumentNotValidException e) {
        BindingResult bindingResult = e.getBindingResult();
        // 存储错误信息
        List<String> errors = new ArrayList<>();
        bindingResult.getFieldErrors().stream().forEach(item -> errors.add(item.getDefaultMessage()));

        // 将list中的错误信息拼接起来
        String errMessage = StringUtils.join(errors, ",");
        // 记录异常信息
        log.error("【系统异常】{}", e.getMessage(), errMessage);

        return new RestErrorResponse(errMessage);
    }
}
